1.SC Codes
142
4. Check the harness.
If it is defective, replace it. Turn the main power OFF and then ON.
5. Replace the main PCB.
SC509-01
Error Name
Multi Bypass Tray Upper Limit Detection Error
Pattern
B
Error Condition
During tray initialization, the upper limit sensor fails to detect before the tray is lifted (the pick-up
solenoid is off) (three times consecutively).
Major Cause
ï‚· Power of downstream unit is not turned on.
ï‚· Pick-up solenoid is defective or not connected properly.
ï‚· Upper limit sensor is defective or not connected properly.
ï‚· Harnesses are damaged.
ï‚· PCB is defective.
Solution
In addition to checking for sensor/actuator defect by eye, also execute Input/Output Check as
necessary.
1. Set (slide) the bypass tray again. Turn the main power OFF and then ON.
2. Check the connectors of the harnesses related to upper limit detection (upper limit sensor / relay
harness).
Reconnect the connectors. Turn the main power OFF and then ON.
3. Check the electrical components related to upper limit detection (upper limit sensor / pickup roller
solenoid).
If they are defective, replace the components. Turn the main power OFF and then ON.
4. Check the harnesses (upper limit sensor / pickup roller solenoid / relay harness).
If the harnesses are defective, replace the harnesses. Turn the main power OFF and then ON.
5. Check the bypass tray unit PCB.
If it is defective, replace it. Turn the main power OFF and then ON.
6. Check the A3 LCT PCB.
If it is defective, replace it. Turn the main power OFF and then ON.
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